Engineers&#39; patent preparation kit



June 15, 1965 F, BR E 3,188,740

ENGINEERS PATENT PREPARATION KIT Filed March 31. 1960 I 3 Sheets-Sheet 1 ENGINEERS PATENT PREPARATION KIT Filed March 31, 1960 2 Sheets-Sheet 2 6 /7 42 J; .5/ ea /7 4354 IPA/V676 J. Mail A3? Mam United States Patent 3,1535%,74tl ENGKNEERS PATENT PREEARATTQN KIT Francis l). Brewer, 27 I'i'fohema Ave Walthani, Mass. Fiied Mar. 31, 1968, Ser. No. 183% 1 Claim. (Cl. Sis-76) This application is a continuation-in-part application of my copending application No. 645,652 filed March 12, 1957.

This invention relates to drafting methods and apparatus for facilitating and controlling the preparation of patent illustrations such as those which normally complement the specifications of applications for United States Letters Patent, which applications follow prescribed governmental rules and standards.

The main purpose of the invention described hereinafter is to have a compact portable drafting apparatus accompanied by necessary engineering and drafting equipment that can be readily set up in close quarters for the preparation of sketches as well as preliminary and final patent illustrations.

The invention includes, among its characteristic features, novel methods and means to facilitate and accelerate the processes of applying ink, dye, stain, or fluid coloring to bristol board, drawing paper, graph sheets, sketch sheets or other fiat surfaces serving as vehicles for reception of such design-delineating materials. All such features supplement those aspects of the invention that are covered generically in my co-pending application No. 645,652 filed March 12, 1957, of which the present application is a continuation-in-part.

Fluid materials used in design and pictorial drafting, and analogous operations, as, for example, the inking of patent drawings, require a certain amount of time to dry, that is, to be transformed from the fluid to the permanently set or solid state. During this drying period there is danger of blotting or smearing of the ink or other delineating fluid, as by either accidental or intentional brushing thereof in the process of moving the hand or some drafting aid (T-square or template, for example) across the surface area containing the recently applied ink or other marking fluid.

Heretofore efforts to avoid such blotting or smearing have led to the practice of interrupting the drafting or other illustrating operation, after each stroke of the drafting process, to permit the lapse of a period of time suflicient for completion of the ink-drying cycle; otherwise the movement of the T-square, template, or other drafting aid across the recently inked surface would be likely to produce objectionable blotting or smearing. This practice caused a loss of time and a natural nervous disturbance to draftsmen in waiting for the ink to dry.

The present invention provides methods and means permitting continuous, uninterrupted application of ink or other marking fluid, and continual adjusting progression of drafting aids across the work area in a manner that avoids physical contact between such drafting aids, on the one hand, and the still fluid ink, on the other, thereby eliminating or substantially minimizing the danger of smearing or otherwise defacing the illustration .or design as it develops, stroke by stroke. Use of the principles of the present invention allows continual Working over wetted surfaces by bridging over said surfaces, in contra-distinction to the old method of having the instruments lay directly on the work sheet.

The invention further provides methods and apparatus for orienting the Work-sheet to the illustrator, in place of the old method of orienting the draftsman to the drawing.

Another feature of the invention lies in its ready adaptability to incorporation into apparatus of a portable. nature, particularly suitable for use on tables, light-boxes, classroom desks; on suitable stands locatable on floors of Patented June 15, 1965 ice rooms and laboratories; in cars during transit or standing idle; as well as in the open air production of maps and other similar sketches necessary to technical subjects.

These and other objects, advantages, and features of my invention will become apparent upon consideration of the following detailed description of several embodiments thereof, especially when taken in conjunction with the accompanying drawings, in which:

FIG. 1 shows a drafting board having a recessed area equipped with a mat or pad upon which the drafting paper may be placed and securely held, and also having an outer margin adapted to support a drafting appliance in vertically spaced relation to the Work sheet when the latter is placed in position upon such pad, thus facilitating practice of the invention;

FIG. 2 is a sectional view along line 2-2 of FIG. 1;

FIG. 3 is an isometric view of a drawing board assembly embodying the features illustrated in FIGS. 1 and 2, along with additional features;

FIG. 4 is a cross-sectional view along line 4-4 of FIG. 3;

FIG. 5 is an isometric View illustrating a modified form of the invention wherein a removable tray forms part of the assembly;

FIG. 6 is a cross-sectional view on line 66 of FIG. 5;

FIG. 7 is a modified cross sectional view at 7-7 of FIG. 6 representing a third embodiment of the invention;

FIG. 8 is a cross sectional view of a fourth embodiment of the invention, illustrating one method of combining recess, blade and pedestals for pivotal flexibility;

FIG. 9 shows how the supporting member with adhesive pad afiixed is usable independently of any upper component by using a blade having a center finger pedestal and two exterior supporting screw pedestals as a means to keep said blade laterally constant above the work sheet; and

FIG. 9a is an exploded view of a main element of the invention, namely, the work-gripping pad.

FIGS. 1 and 2 show a laminated drawing board it) having a depressed recess 12 wherein a work-gripping pad 11 has been inserted and securely fastened to surface 14 of drawing board 10.

Work-gripping pad ill consists of a standard x patent bristol board having printed side up when located in recess 12 of drawing board 10, said pad 11 being adapted to receive a work sheet for graphic delineating purposes well known to the art of patent drawings. The surfaces of the pad 11 are treated with adhesive material, prepared in the following manner: Spread a layer of white rubber based paper cement 15, well known to the graphic art, to the underside of bristol board 13 and immediately apply a similar layer of said cement to surface 14 of drawing board it as illustrated in FIGS. 1 and 2; then press the two wetted surfaces just mentioned downwards until solidified at the bottom of recess 12 to produce a permanent adhesion 15 and making work holding pad 11 an integral part of the drawing board lil. Work-gripping surface 16 of pad 11 is then prepared by spreading three applications of said paper cement on the top surface of bristol board 13 allowing suflicient time for each layer of cement to set before adding the next application. This method will produce a tacky adhesive surface 16 which is ready to receive work sheet 20 in a manner permitting application and removal of said sheet 20 as desired without damage to either the work sheet 29 or the adhesive surface 16 during the preparation of a patent drawing. Drawing board 16 comprises a base 10 of wood, as for example, a piece of marine plywood A" thick x 12" wide X 20" long, and a rectilinear frame element Iii made of /s" thick plywood bonded or fastened by brads or screws to base It). Recess 12, having subreccsses 18, is cut out to snug-fit around a standard x rectilinear patent bristol board prior to attaching frame ltl" to base '10; Work-gripping pad '11 in place as previously paratus previously described herein and the ability of Work-gripping surface 16 to hold work sheets laterally smooth. v

Again referring to FIG. 1 suitable sub-recesses 18 adjacent the sides of recess 12 of drawing board 10 facilitate the removal of work sheets 20 from the drafting apparatus recess 12 during process of patent preparation drawings. With such an arrangement of a recessed drawing board as shown in FIGS. 1 and 2 and described, in the foregoing, the outer margin 17 serves as the pedestal support for a drafting blade 50 (shown in FIG. 8) placed across the recess 12 at any angle necessary to process a drawing while applying design delineating materials. The periphery of the drawing board apparatus as. disclosed in FIGS; 1 and 2 may be circular as well as rectilinear as will be described hereinafter. a

' A modification of the embodiment illustrated in FIGS. 1 and 2 is graphically presented vin FIGS. 3 and 4, wherein the elements 10' and 10" of FIG. 2 take'the respective forms illustrated at 66' and 60" in FIG.,3 and are supplemented with a cover element 69" hinged thereto as indicated at 61,.the said cover 60" being equipped with a cross blade 59 embodying. the principle of'bridging cutout portion 64 of said cover 60', the outer extremities of blade 50 being supported on pedestal outer margin surfaces 17 when cover 60" isvcloseddown on element 66", and screw pedestal 51 of said blade .50 engages. lateral surface of work sheet 20, this principle of the invention being further shown in FIG. 8. V I

The assembly 60 shown in FIG. 3 has a base element 60' shaped out of a single piece of transparent material such] as Lucite 4;" thick x 10" wide x 21" long, a recessed and sub recessed frame element 60" fastened orcemented in place on top of element'60 and a cover element60' hingeable at 61 by adhesive tape, the cover being made of a V thickx 10" wide X 20" long piece of Lucite.

or similar transparent material. Wor -gripping pad 11 is then cemented in place at bottom of recess 12 of frame 1 element 60 thereby completing this structural embodi ment of theinvention.

Comparing FIG. 3 with FIG. 2 it will be noted that this drawing board arrangement60 includes a draw-' ing board base 60 that is comparable to base 10 of FIG. 2, rectilinear frame 60" having'recess 12 to accommodatework-gripping pad 11, the latter beinglikewise comparable to upper frame 10" having recess '12 to enclose work-gripping pad 11., In'both arrangements the gripping pad is securely fastened to bases 10 and 60" of, drawing boards 10 and 60, and both arrangements thus allow the principle depicted in FIG.. 8 to be. practiced by having blade bridged'ac ross recesses 12' and 12. and

supported by 'pedestals17 at the blades outer extremitiest In both cases the work sheet 20 may be placed on or re-' moved as desired, with slots 18 facilitating easy removal,

of said work sheets 20. v

work sheet 20 to be used while processing graphic illustrations.

Another feature of the embodiment shown in'FIG. 3 a is the simple but effective means to rotate the complete drafting board arrangement with cover 60" closed.

and located is by use of pivotal pin and indexing pin 66 passing through holes 67 and 68 respectively of base 60' into a drafting table or suitable on a drafting table. (not shown). 1 V V Still another feature of the drafting board assembly as indexing plate placed -60 Still referring to FIG. 3; a cover 60 hinged by means remains.

although in the form of a removable t-ray, nevertheless rests on the base 7)', so'ithat regardless of necessary dimensional alterations in contour, the said tray serves the function of the equivalent structure of FIG. 2. The outer margin surfaces 17 on the top of tray 70", like element 60" of FIG; 3 and frame element 107' of FIG. 2 may be fabricated by modern plastic molding techniques, and aifordspedestal support for blade 59 with screw pedestal 51 bearing on the lateral top surface of work sheet 20; Thus there is again used the invention principle (see FIG. 8) in that the FIGS. 5-6 construction facilitates practice of the invention to the same degree ,as do board assemblies 10 of FIG. 2 and 60 of FIG. 3.

It will be noted that the assembly ofFIGS. 5 and 6 differs from thatof FIGS. 1 and 2 in that the central portion is apertured completely through the thickness of base 10 to permit penetration of light rays 'from any suitable source of illumination (not shown) located below the assemblypto be projected through base 10', transparent tray 70" and work-gripping'padunit 11. In many drafting operatiohsQas for example, tracing and reproductive tasks} the use of under-u rface lighting is helpful as a means ofsilhouetting and sharpening the images to be traced," reproduced, or re-designed. The exemplary dimensions suggested above forthe structures 'of FIGS. 1 and 2 can advantageously be employed, with variations as dictated by circumstances, in, the structure of FIGS. 5 and 6. The same is true as to contour of the structure, that is, the use of a circular contour in lieu of a rectangular contour, wheneverrotary flexibility is' desired.

FIG. 7 shows a modification of the invention wherein base element-70' is constructed of a solid piece of suitable material having a recess and sub-recesses formed, depressed or removed for the reception of tray 70", or for the work-gripping assembly 11 in the event said tray is not used. a

Base element 70' need not be made of Wood or plywood, but maybe plastic molded, or the product of a modern die stampingvm aterial processing .shop, where sheet metal is progressively formed, trimmed and reformed into various shapes and sizes as required.

The pedestal principle of having screwelernent 51 adjustable in blade 50 holding down work sheet20 whereas surface pedestals 17 hold blade 50 laterally up above work sheet 20 is clearly represented by forces P P and P respectively. p 1

Referring to FIG. 8 and also to FIG. 30 of eo-pendmg application 645,- 652,21 'rotaryttype modification of the .invention is shown, wherein a circularly contoured base is pivotally mounted onto a ,conventlonal drafting board or' table 81 by means of pivot-pin 82 and turnable within a neat fitting circular cut-out 83 in a stationary .draftingboard cover 84.

FIG. 9 is an enlarged and exaggerated illustration of.

how'ba'se 60' of FIG. .3 may beused when recessed portion 605' and cover 60 are removed and only. the main element '60? having work-gripping pad 11 affixed thereto Blade 50 having center pedestal 51, and outer extremities pedestals 52 and 53 adjusted approximately to desired depth 85 above work sheet 20, again shows how the blade 50 is elevated above the work surface of work sheet 20 during processing and at all times except for the contact points of the pedestals just referred to. Blade 50 is transportable laterally and indexable above the graphic work sheet 20, as well as in some modification described herein base 60' is also turnable such as shown in FIG. 8.

Arrows P P and P in FIGS. 7, 8 and 9 indicate directions of force application, as explained in my earlierfiled patent application above-identified.

FIG. 9a shows a bristol board 13 having a coating of a white rubber based adhesive cement 15 applied to the undersurface, and three successive coatings 16 of said cement to the upper surface. This assembly is then cemented in place on any suitable base as for example, a properly dimensioned recessed area in the supporting frame such as illustrated in FIGS. 1-8, inclusive. Bristol board 13 of pad assembly 11 may be replaced by any other suitable materials such as press board, plastic or wood that the cement will adhere to effectively. The number of coatings do not necessarily have to be one under and three on top, as long as the desired adhesion to the base on the under side is accomplished and the desired adhesiveness on surface 16 is sufficient to hold work sheets to said surface 16 of assemblies 11 and 11'.

The screw pedestals are retractable and removable and are used in combination with the work-gripping pad only I on those occasions when conditions require, as for example, when humidity is prevalent to the point where there is considerable difiiculty in maintaining the work sheet flat against its supporting surface.

What I claim is:

Apparatus for use in executing graphic compositions, said apparatus comprising a frame having opposed peripheral surfaces in one plane and a depressed work-receiving central surface in a second plane parallel with, and below, said first plane, a pen-supporting blade spanning said opposed peripheral surfaces, pedestal means extending downward from said blade to engage the surface of the work-sheet over-lying said central surface, and recessed means integral with said frame for facilitating removal of the work-sheet from said central surface without disturbing the frame, said depressed central surface being constituted by a pad or mat adapted to hold the work-sheet by adhesive inter-engagement of the interfacial surfaces of said pad and work-sheet.

References Cited by the Examiner UNITED STATES PATENTS 1,089,571 3/14 McNutt 33207 1,262,744 4/ 18 Brown 33-75 2,009,656 7/35 Gray -131 2,388,402 11/45 Fry 33-75 2,543,476 2/51 Southern 33-107 2,689,412 9/54 Young 33-207 2,826,816 3/58 Major 33-107 2,908,079 10/59 Barrett 3376 FOREIGN PATENTS 476,568 12/37 Great Britain.

OTHER REFERENCES Notes on Mechanical Drawing, R. S. Wallis, page 21, copyright 1922.

ISAAC LISANN, Primary Examiner. LOUIS R. PRINCE, LEONARD FORMAN, Examiners. 

